[Temporal and spatial characteristics and correlation of the coordinated development of economy, society and ecological environment in the Yangtze River Delta, China].

The imbalance of regional development is one of the important obstacles for the implementation of regio-nal coordinated development strategy. Based on the panel data of 41 cities in the Yangtze River Delta from 2010 to 2019, the regional coordinated development index system with five subsystems was constructed, including economic development, science and education, infrastructure, people's life, and resource and environment. With the help of GeoDa and ArcGIS software, we used measurement model of regional coordinated development and method of exploratory spatial data analysis to analyze the temporal and spatial variations and internal correlation of various elements of regional coordinated development in the Yangtze River Delta. The results showed that, from the perspective of regional development, the coordination of regional development in the Yangtze River Delta had increased annually from 2010 to 2019. The level of economic development and science and education in Shanghai and Suzhou was ahead of other cities, while the development coordination of Northwest Anhui, Zhoushan and Huangshan was weaker than other cities. The order of average autocorrelation degree of each subsystem from high to low in the Yangtze River Delta from 2010 to 2019 was people's life, economic development, resource and environment, science and education, and infrastructure. Among them, the global Moran's index (Moran ) of economic development and science and education subsystem showed a downward trend, while science and education subsystem showed no significant correlation. Moran of infrastructure subsystem was mostly at the low level with a great fluctuation in different years. People's life had obvious spatial characteristics of high-high and low-low agglomeration. The global Moran of resources and environment showed a pattern of "V" distribution. Economic development and science and education were the two factors most closely related to regional coordinated development.